8 results about "Stack effect" patented technology

This invention provides an intelligent prediction method and system for village fire spread paths, relating to the fields of fire science and computer physics simulation technology. The invention acquires three-dimensional spatial topological data and meteorological parameters of the village; through a street-valley and chimney effect coupled simulation module, combined with alleyway aspect ratio, slope, and wall roughness, it quantifies the wind field variation vector and spontaneous suction air volume under narrow terrain; through a multi-source fire leap-forward extrapolation module, it constructs a dynamic model covering fire generation, micro-topographic lift correction flight, and physical constraints of triggering conditions, extrapolating the coordinates of secondary fire jump points and filtering false fire alarms; through a radiation feedback and dynamic prediction module, it calculates the superposition of heat radiation from multiple reflections within the building angle to assess the risk of premature spontaneous combustion, and performs adaptive path replanning based on the monitoring logic of meteorological deflection and building collapse abrupt changes. This invention objectively recreates the discontinuous fire spread process at the microscale, improving the timeliness of prevention and rescue decisions.

This invention relates to a foundation wall structure suitable for EPS board thin-plastered exterior wall insulation systems. The purpose is to address the problems of existing building walls being prone to chimney effects and insulation layer detachment during fires. This invention's foundation wall structure is constructed from multiple masonry blocks; each cavity of a block is fitted with a cover plate, and support strips are positioned between upper and lower blocks. By incorporating a horizontal annular flange and cover plate in the center of each cavity of the block, the resulting cover plate vertically isolates airflow, preventing the chimney effect caused by vertically connecting the channels of the building blocks, thus improving the fire resistance of the exterior wall insulation system. The support strips support the EPS insulation board and corresponding fixing components, providing support and increasing the connection strength between the foundation wall structure and the EPS insulation board, reducing the risk of insulation layer detachment.

The application provides a fireproof system and a high-rise building fireproof method, and relates to the technical field of fireproof systems.The fireproof system comprises a liftable protection unit, a driving unit, a detection unit and a control unit, realizes early automatic detection and rapid response of a building outer facade fire, moves the liftable protection unit to above a fire source along a guide rail through control, starts a wind power generating part to generate downward airflow, can form a wind pressure barrier on a spreading path, effectively interferes and suppresses upwardly rising flames and high-temperature smoke gas due to a 'chimney effect', delays vertical spreading of the fire along an outer wall, not only saves valuable time for vertical evacuation of people in the building and transfer to a roof platform, reduces escape risks, but also creates more favorable conditions for rescue of external fire fighting forces, and improves active protection ability and overall safety resilience of high-rise buildings in response to such fires.

This application relates to a European-style transformer substation chimney-type heat dissipation top cover, belonging to the technical field of power equipment heat dissipation. It includes a top cover body, with a ventilation mechanism at the top of the top cover body. The ventilation mechanism includes two fixed frames, the bottom ends of which are fixedly connected to the top of the top cover body. A waterproof cover plate is fixedly connected to the top of each fixed frame. A ventilation fan is fixedly connected inside each fixed frame. A ventilation opening is provided between the fixed frame and the waterproof cover plate. A reinforcing assembly is provided at the bottom of the top cover body, including multiple vertical fixing plates, the external parts of which are fixedly connected to the bottom of the top cover body. The advantage of this application is that the ventilation mechanism at the top of the top cover combines a chimney-type structure with a ventilation fan. When the transformer substation generates heat during operation, the fan drives air to flow upwards through the ventilation openings, utilizing the chimney effect to accelerate the discharge of hot air.

The present application relates to the technical field of photo-thermal power generation, and specifically discloses a cooling method of a heat absorption tower and an air-cooled heat absorption tower. The present application realizes the intelligent transformation from the traditional air cooling "constant air volume" to "on-demand air supply" through the intelligent control of temperature difference driving, and the system monitors in real time and fully utilizes the natural chimney effect. Only when the natural ventilation is insufficient, the fan starts to compensate, thereby minimizing the invalid operation time and power consumption of the fan, and significantly reducing the power station auxiliary power rate. At the same time, the closed-loop automatic control system based on real-time temperature difference feedback can accurately respond to the changes of power station load and environmental conditions, always providing stable and sufficient cooling air volume for the exhaust steam condensing, and ensuring the reliable operation of the cold end system. The high degree of automatic control reduces the complexity and uncertainty of manual intervention, and improves the intelligent management level and operation stability of the entire power station.

The application discloses a kind of houses air conditioning control systems combined passive energy-saving mechanism, specifically relates to energy saving and air conditioning control field, including acquisition analysis module, over-limit air supply module, fall stop module, dynamic heat release module and coordination switching module;Acquisition analysis module is by collecting the indoor temperature data at indoor exhaust port and the underground air temperature and humidity data at underground fresh air inlet, the trend analysis result is generated by combining the collected data with historical temperature curve and solar radiation change trend, and the prediction result of future over-limit or fall of room temperature is solved based on trend analysis result;The scheme introduces trend prediction and determination logic, and combines the passive adjustment path of underground air circulation, phase change heat storage unit and chimney effect, to realize the cooperative operation of feedforward control and feedback correction in each module, to solve the problem of regulation delay and energy consumption amplification caused by sensing lag and execution inertia.

The utility model discloses a kind of grain storage warehouse storehouse roof heat-removing devices, set in arch plate, arch plate is provided with multiple installation sites, installation site is provided with mounting seat, mounting seat is fixedly installed with fixed base, fixed base connects support, fixed base is rotatably connected with wind neck by support, wind neck is fixedly installed with wind cap, wind cap includes several wind blades, several wind blades are fixedly installed in wind neck and curved to form a hollow spherical structure.The grain storage warehouse storehouse roof heat-removing device, when the temperature difference exists between the temperature of arch plate and external environment temperature, the power airflow generated by the low air density of high temperature and temperature difference and chimney effect are used, wind cap is rotated, flowing airflow also accelerates wind cap rotation, so that the hottest air gathered at the top of arch plate is smoothly discharged to outside from between the blades of wind cap, outside gas enters between arch plate through louvre at storehouse gable end, so that the inside and outside gas exchange of storehouse arch plate is sufficient, and then effectively reduce storehouse temperature.

The present application discloses a tray with ventilation structure, comprising a tray body, the tray body has at least one cavity for containing articles and a bearing edge arranged around the cavity, the bearing edge has first and second support units arranged adjacently, when N tray bodies are stacked in vertical direction, the first support unit of the Mth tray body abuts against the first support unit of the M+1th tray body to support and limit the Mth tray body on the M+1th tray body. The present application communicates the cavity of the tray body and the external environment by setting ventilation gaps with height difference on the bearing edge of the tray body, the first and third sections of the ventilation gaps can drive the air in the cavity and the external environment to automatically exchange by the chimney effect of hot air rising, to balance the temperature and humidity difference of the gas in the cavity and the external environment, so that the condensation phenomenon can occur in the tray body.